CVE-2025-40094 (GCVE-0-2025-40094)
Vulnerability from cvelistv5
Published
2025-10-30 09:48
Modified
2025-10-30 09:48
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_acm: Refactor bind path to use __free() After an bind/unbind cycle, the acm->notify_req is left stale. If a subsequent bind fails, the unified error label attempts to free this stale request, leading to a NULL pointer dereference when accessing ep->ops->free_request. Refactor the error handling in the bind path to use the __free() automatic cleanup mechanism. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 Call trace: usb_ep_free_request+0x2c/0xec gs_free_req+0x30/0x44 acm_bind+0x1b8/0x1f4 usb_add_function+0xcc/0x1f0 configfs_composite_bind+0x468/0x588 gadget_bind_driver+0x104/0x270 really_probe+0x190/0x374 __driver_probe_device+0xa0/0x12c driver_probe_device+0x3c/0x218 __device_attach_driver+0x14c/0x188 bus_for_each_drv+0x10c/0x168 __device_attach+0xfc/0x198 device_initial_probe+0x14/0x24 bus_probe_device+0x94/0x11c device_add+0x268/0x48c usb_add_gadget+0x198/0x28c dwc3_gadget_init+0x700/0x858 __dwc3_set_mode+0x3cc/0x664 process_scheduled_works+0x1d8/0x488 worker_thread+0x244/0x334 kthread+0x114/0x1bc ret_from_fork+0x10/0x20
References
Impacted products
Vendor Product Version
Linux Linux Version: 1f1ba11b64947051fc32aa15fcccef6463b433f7
Version: 1f1ba11b64947051fc32aa15fcccef6463b433f7
Version: 1f1ba11b64947051fc32aa15fcccef6463b433f7
Version: 1f1ba11b64947051fc32aa15fcccef6463b433f7
Version: 1f1ba11b64947051fc32aa15fcccef6463b433f7
Version: 1f1ba11b64947051fc32aa15fcccef6463b433f7
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_acm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c5d116862dd3ed162d079738a5ebddf9fceea850",
              "status": "affected",
              "version": "1f1ba11b64947051fc32aa15fcccef6463b433f7",
              "versionType": "git"
            },
            {
              "lessThan": "2b1546f7c5fc6c44555a8e7a2b34229d1dcd2175",
              "status": "affected",
              "version": "1f1ba11b64947051fc32aa15fcccef6463b433f7",
              "versionType": "git"
            },
            {
              "lessThan": "e348d18fb0124b662cfefb3001733b49da428215",
              "status": "affected",
              "version": "1f1ba11b64947051fc32aa15fcccef6463b433f7",
              "versionType": "git"
            },
            {
              "lessThan": "201a66d8e6630762e760e1d78f1d149da1691e7b",
              "status": "affected",
              "version": "1f1ba11b64947051fc32aa15fcccef6463b433f7",
              "versionType": "git"
            },
            {
              "lessThan": "c4301e4dd6b32faccb744f1c2320e64235b68d3b",
              "status": "affected",
              "version": "1f1ba11b64947051fc32aa15fcccef6463b433f7",
              "versionType": "git"
            },
            {
              "lessThan": "47b2116e54b4a854600341487e8b55249e926324",
              "status": "affected",
              "version": "1f1ba11b64947051fc32aa15fcccef6463b433f7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/function/f_acm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.27"
            },
            {
              "lessThan": "2.6.27",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.196",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.114",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.196",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.158",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.114",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.55",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.5",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18-rc1",
                  "versionStartIncluding": "2.6.27",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_acm: Refactor bind path to use __free()\n\nAfter an bind/unbind cycle, the acm-\u003enotify_req is left stale. If a\nsubsequent bind fails, the unified error label attempts to free this\nstale request, leading to a NULL pointer dereference when accessing\nep-\u003eops-\u003efree_request.\n\nRefactor the error handling in the bind path to use the __free()\nautomatic cleanup mechanism.\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000020\nCall trace:\n usb_ep_free_request+0x2c/0xec\n gs_free_req+0x30/0x44\n acm_bind+0x1b8/0x1f4\n usb_add_function+0xcc/0x1f0\n configfs_composite_bind+0x468/0x588\n gadget_bind_driver+0x104/0x270\n really_probe+0x190/0x374\n __driver_probe_device+0xa0/0x12c\n driver_probe_device+0x3c/0x218\n __device_attach_driver+0x14c/0x188\n bus_for_each_drv+0x10c/0x168\n __device_attach+0xfc/0x198\n device_initial_probe+0x14/0x24\n bus_probe_device+0x94/0x11c\n device_add+0x268/0x48c\n usb_add_gadget+0x198/0x28c\n dwc3_gadget_init+0x700/0x858\n __dwc3_set_mode+0x3cc/0x664\n process_scheduled_works+0x1d8/0x488\n worker_thread+0x244/0x334\n kthread+0x114/0x1bc\n ret_from_fork+0x10/0x20"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-30T09:48:02.446Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c5d116862dd3ed162d079738a5ebddf9fceea850"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b1546f7c5fc6c44555a8e7a2b34229d1dcd2175"
        },
        {
          "url": "https://git.kernel.org/stable/c/e348d18fb0124b662cfefb3001733b49da428215"
        },
        {
          "url": "https://git.kernel.org/stable/c/201a66d8e6630762e760e1d78f1d149da1691e7b"
        },
        {
          "url": "https://git.kernel.org/stable/c/c4301e4dd6b32faccb744f1c2320e64235b68d3b"
        },
        {
          "url": "https://git.kernel.org/stable/c/47b2116e54b4a854600341487e8b55249e926324"
        }
      ],
      "title": "usb: gadget: f_acm: Refactor bind path to use __free()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40094",
    "datePublished": "2025-10-30T09:48:02.446Z",
    "dateReserved": "2025-04-16T07:20:57.163Z",
    "dateUpdated": "2025-10-30T09:48:02.446Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-40094\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-30T10:15:33.900\",\"lastModified\":\"2025-10-30T15:03:13.440\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: gadget: f_acm: Refactor bind path to use __free()\\n\\nAfter an bind/unbind cycle, the acm-\u003enotify_req is left stale. If a\\nsubsequent bind fails, the unified error label attempts to free this\\nstale request, leading to a NULL pointer dereference when accessing\\nep-\u003eops-\u003efree_request.\\n\\nRefactor the error handling in the bind path to use the __free()\\nautomatic cleanup mechanism.\\n\\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000020\\nCall trace:\\n usb_ep_free_request+0x2c/0xec\\n gs_free_req+0x30/0x44\\n acm_bind+0x1b8/0x1f4\\n usb_add_function+0xcc/0x1f0\\n configfs_composite_bind+0x468/0x588\\n gadget_bind_driver+0x104/0x270\\n really_probe+0x190/0x374\\n __driver_probe_device+0xa0/0x12c\\n driver_probe_device+0x3c/0x218\\n __device_attach_driver+0x14c/0x188\\n bus_for_each_drv+0x10c/0x168\\n __device_attach+0xfc/0x198\\n device_initial_probe+0x14/0x24\\n bus_probe_device+0x94/0x11c\\n device_add+0x268/0x48c\\n usb_add_gadget+0x198/0x28c\\n dwc3_gadget_init+0x700/0x858\\n __dwc3_set_mode+0x3cc/0x664\\n process_scheduled_works+0x1d8/0x488\\n worker_thread+0x244/0x334\\n kthread+0x114/0x1bc\\n ret_from_fork+0x10/0x20\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/201a66d8e6630762e760e1d78f1d149da1691e7b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2b1546f7c5fc6c44555a8e7a2b34229d1dcd2175\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/47b2116e54b4a854600341487e8b55249e926324\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c4301e4dd6b32faccb744f1c2320e64235b68d3b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c5d116862dd3ed162d079738a5ebddf9fceea850\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e348d18fb0124b662cfefb3001733b49da428215\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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